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Thank you all for your input and thoughts on antenna tuning. I have added a tuning box to my mobile setup and now have a good match

Thank you for your thoughts. I will research and investigate. I appreciate it

It's still 1.5

I had it on a 3/8 stud. With 18ft of 217 coax. Swr was 1.2 and a 1/4 watt reflect at 1.5k . It Was easily toonable for any Chanel. I decided to upgrade. It's now on a high power puck mounted on a 4 " bracket with new 217 coax , but it's not happy. Swr now 1.5 I'm trying to get lower match back

Predator 30k short shaft. With 18ft of 217 coax on a high power puck mounted on a 4" bracket

It was working great with 1.5k . I decided to upgrade. I mounted it on a high power puck on a 4" mount. With new 217 coax . Now the swr is 1.5 I did adjust the stinger in and out with mfj-259d attached. Swr only got worse and ohms changed drastically. For some reason it's seeing...

Yes. Makes sense. I'm try to change the Impedance to make the swr lower . So witch would you suggest. Inductor air coil on the positive lead of coax and cap or chock off the back through the ground ? Here's a picture.

Yes. When I used the stud mount previously I had 1.2 and 1/4 watt reflect. I have an mfj-259d antennaanalyzer. I installed new 4" bracket with high power puck and new 217 coax 18ft . Now swr is 1.5 I tried a shunt but it raised swr to 1.8 , maybe it's too long ? Not sure .

Yes. That is the one. I used it on a 3/8inch stud mount on a 2 " bracket. My swr was 1.2 and 1/4 watt reflect I switched to a 4" mount with a high power puck. Now swr is 1.5 I ran new ground straps and new 217 coax . For some reason it's not happy. I tried changing the angle up and down...

Predator 30k

Hello. I have a question about tuning an antenna. Is it better to use an air variable capacitor or a roller inductor "18f" with a choke to change impedanc, to Obtain a lower match ? Please share experience and suggestions. Thanks

The radio does receive properly without the amp. I will see about ordering a new relay for the amp. Thanks much

Hello. Can someone explain why my receive goes quiet after transmitting on my radio? If I click the microphone button on and off, then the receive comes back. I have an amplifier in line, maybe something is going out on the amp ?

Hello everyone. So I had to move 2 capacitors to read the uf and voltage to complete schematic with board # and values. c111 .1uf 16v and c93 .1uf 16v capacitors. I plugged the radio back in and turned unit on, the hum is gone. I will start the process of replacing each cap and checking...

Thanks. I'm checking them out. I appreciate it

Sorry connected

No problem with regular charging system. I contacted my radio straight to the battery and the voltage is 12.6 .the radio would perform better at 14.5 to 15 volts.

Hello everyone. Does anyone know if it's possible to up the voltage in a vehicle for a mobile radio? I know vehicles are considered 12 volt and amp hr depends on size of battery, but I would like to up the voltage similar to using a power supply. Maybe its possible to design something with...

Hello everyone. Is it possible to Calculate the DB gain of you're signal from an antenna, or how much gain an antenna is producing?